Dream Ledger for Me not You

I was having a very strange dream that seemed so familiar. It wasn't like I had this exact dream before, but I had memories inside this particular dream world. I was trying to get into this very exclusive weapon shop to buy a new dagger. It felt like a videogame. There were poison gas traps and armed guards. I got past all of that stuff and I was looking at the weapon displays and I thought that this was all very bizarre. I sort of blacked out, or at least I don't remember anything, and when I came to I was outside my own house. I was jumping around in the street trying to fly, but only able to stay in the air about 15-20 seconds at a time. I realised I was dreaming as I was waking up.